US4427181A - Device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks - Google Patents

Device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks Download PDF

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Publication number
US4427181A
US4427181A US06/343,806 US34380682A US4427181A US 4427181 A US4427181 A US 4427181A US 34380682 A US34380682 A US 34380682A US 4427181 A US4427181 A US 4427181A
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United States
Prior art keywords
support member
lifting
supporting element
support
jack
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Expired - Lifetime
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US06/343,806
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English (en)
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Bengt V. Andersson
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/08—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being operated by fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F13/00—Common constructional features or accessories
    • B66F13/005—Thrust chain devices

Definitions

  • the present invention concerns a device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks.
  • a so-called climbing jacks are used, i.e., a jack which cooperates with an elongated vertical carrying member and upon retraction and elongation alternately lifts the load and is moved stepwise along the carrying member.
  • a jack which cooperates with an elongated vertical carrying member and upon retraction and elongation alternately lifts the load and is moved stepwise along the carrying member.
  • An example of such a device is shown in Swedish Patent No. 363,798.
  • the object of the present invention is therefore to provide a device of the type described by means of which the above stated disadvantages are overcome.
  • FIG. 1 is a front elevation of a portion of a device according to the invention
  • FIG. 2 is a plan view of a support plate forming a part of the device
  • FIG. 3 is an isometric view of two devices or units according to the invention while lifting a load
  • FIG. 4 is a view corresponding to FIG. 1 and showing a second embodiment according to the invention.
  • the device or unit for a stepwise lifting of the load comprises a jack 1 and an elongated, vertically upright mast 2.
  • the jack 1 is of conventional construction, including a support portion 3 and a lifting portion 4 which is extendable out of and retractable into said support portion 3.
  • the jack 1 is preferably actuated by means of hydraulic fluid, but a mechanically operated jack may also be used.
  • the lifting portion 4 can be provided with a head 5, which has a special construction known per se and is intended to prevent unintentional retraction of the jack, e.g., upon failure of the hydraulic conduits, as will be further described later on.
  • the top side of the head 5 is furthermore provided with a central projection or a stud 6 having a smaller cross section than the head 5. The function of the projection or stud will be described below.
  • the elongated vertically upright mast 2 includes a scaffold or frame which is not shown in detail, since it does not form any part of the invention and may be designed in a manner suitable for the prevailing conditions, e.g., in the form of a frame-work construction.
  • the object of the scaffold is to retain the remaining portion of the mast in rigid vertically upright position.
  • Said remaining portion comprises a support member 7 in the form of a tube, preferably of square cross-section, or a U-beam which by said scaffold is held in vertical position, whereby the bottom end of the support member 7 rests on a bed 8 or the like, which is rigid enough to support the device and the load lifted thereby.
  • the support member 7 is meant to surround said jack 1 at some distance therefrom, whereby the support portion 3 of the jack 1 rests on said bed 8.
  • the support member 7 a length which is somewhat smaller than the maximum length of the jack 1 in its fully extended lifting position, so that at least a portion of the projection or stud 6 in this position protrudes up over the top plane edge surface 9 of the support member 7.
  • a support member 7 formed by a U-beam is open along one side and, if the support member 7 consists of a tube, it is provided with a lateral opening 7' extending from the top end of said support member at least to a plane flush with the top end of the projection 6 of the jack head 5.
  • the remaining portion of the mast 2 comprises a guiding tube 10 which is supported by the mast scaffold in a vertically upright position coaxially above the support member 7, whereby the bottom end edge thereof is situated at a distance from the top edge surface 9 of said support member 7, so that a slot 11 is formed between said surfaces.
  • the guiding tube 10 preferably has the same cross sectional shape as the support member 7, and the internal cross section and area thereof correspond to those of the support member 7, so that a guide passage 12 is formed which runs through the support member 7 and the guiding tube 10.
  • One side wall of the guiding tube 10 is provided with a slot 14 extending over the entire length of said guiding tube.
  • the guiding tube 10 may for instance consist of a U-beam of the same cross sectional shape as the support member 7, rails 10' being secured to the internal longitudinal edges of the flanges of the U-beam, so that the slot 14 is defined by said rails 10'.
  • a second slot 14 may possibly be provided along the opposite side wall of the guiding tube.
  • the device according to the invention also comprises a number of supporting elements 15.
  • Each supporting element 15 comprises an end plate 16 of such form and dimension that it is displaceable with some play through the guide passage 12 formed by said support member 7 and said guiding tube 10.
  • a column 17 is arranged centrally on one side surface of said end plate 16 and extends perpendicularly out therefrom. The cross section of said column 17 is smaller than the cross section of said end plate 16.
  • the end plate 16 and the column 17 are rigidly interconnected or integral with each other and the overall length of the supporting element 15 is somewhat smaller than the length of a stroke of said jack 1.
  • the device according to the invention includes a support plate 18 which is insertable into the slot 11 between the top end of the support member 7 and the adjacent end of the guiding tube 10.
  • the support plate 18 has such dimensions that in its inserted position it rests firmly on the top edge surface 9 of the support member 7 and it is provided with an edge indentation 19 which is of such form and dimension that in the inserted position of the support plate 18 it loosely embraces the column 17 of a supporting element 15 situated within the guiding passage 12 but does not allow the end plate 16 of said supporting element to pass.
  • edge surface 9 of the support member 7 forms the abutment for the support plate 18.
  • the walls of the support member 7 defining the lateral opening 7' are provided with horizontal grooves or incisions which together define the gap 11 and the bottom edges 11' of which form the abutment for the support plate 18.
  • Said edges 11' may incline downwardly and outwardly, the downwardly directed side face of the support plate 18 being provided with a corresponding chamfer at cooperating edges to prevent the side walls of the support member 7 from being forced apart under the influence of the load.
  • a number of masts 2 of the kind described is erected on the work site and thereafter a jack 1 is placed in the support member 7 of each mast so that it rests against the bed 8.
  • the load is to be lifted by means of four units or devices according to the invention. Said units are then placed in the corners of a rectangle with the slots 14 of the guiding tubes 10 pairwise turned towards each other, whereafter a carrying beam 20 is placed with its ends inserted into said slots 14 to rest on the support plate 18 of the corresponding unit.
  • the load 21 is thereafter placed on the two parallel carrying beams 20.
  • FIG. 3 Such a pair of units is shown in FIG. 3.
  • the lifting of the load 21 is commenced in that the lifting portions 4 of the four jacks 1 are completely retracted within the support portions 3 thereof, whereafter a supporting element 15 is inserted into each support member 7 through the lateral opening 7' thereof, in such a manner that the end plate 16 of the supporting element 15 rests on the top end of the lifting portion 4 of the cooperating jack 1.
  • a suitable number of supporting elements 15 may preferably be placed on a horizontal slide way 15' arranged beside each mast 2 at such a level that said supporting element 15 one after the other can be inserted into each corresponding support member 7.
  • their lifting portions 4 are synchronously forced upwards so that the columns 17 of the supporting elements 15 are pushed upwards through the edge indentations 19 of the cooperating support plates 18 to lift the carrying beams 20 and the load 21 thereon.
  • the carrying beams 20 have been lifted away from the support plates 18, the latter can be pulled out of their gaps 11 since the edge indentations 19 with play accommodate the columns 17 of the supporting elements 15.
  • a retainer or the like may be arranged at the top end of each support member 7 slidably to receive the support plate 18 thereof when the same is pulled out of the gap 11. In this position the carrying beams 20 and the load 21 are completely supported by the jacks 1 and the supporting elements 15 and can be lifted further by extension of the jacks 1, until the supporting elements 15 have been completely pushed out of the corresponding support members 7 and into the guiding tubes 10 with the bottom end surfaces of the end plates 16 a short distance above the top border surface of the gaps 11.
  • each supporting element 15 is preferably greater than the width of the gap 11, so that the top end of the end plate 16 is inserted into the guiding tube 10 before the bottom end thereof is pushed out of the corresponding support member 7.
  • Each supporting element is thereby effectively guided in the guiding passage 12 during the whole lifting step.
  • Each supporting element 15 can also be provided with a central blind hole 22 (see FIG. 4) in the end surface of the end plate 16 and a corresponding pin 23 can be arranged on the top surface of the column 17 for engagement in the blind hole 22 of the overlying supporting element 15 in order to maintain the consecutive supporting elements 15 centered.
  • a similar pin 23 is preferably arranged for the same purpose on the top surface of the projection 6 of the jack head 5.
  • the guiding tube 10 does not have any load supporting function, but only serves as a guide for the supporting elements 15 stacked on top of each other.
  • the guiding tube 10 may therefore be of comparatively weak dimensions, while the support member 7, the jacks 1 and the supporting elements 15 as well as the support plates 18, which carry the whole load, must be dimensioned for the actual load to be lifted.
  • each jack 1 may be provided with two jaws 24 (FIG. 4) arranged horizontally in a common plane and displaceable towards and from each other by means of resilient forces, the force to drive said jaws 24 apart being derived, for example, from a compression spring tensioned between said jaws 24.
  • the outer edges of said jaws 24 are formed to cooperate with mutually facing horizontal grooves 25 arranged in the side surfaces of the support member 7.
  • the grooves are pairwise situated opposite each other and the top edges thereof are preferably chamfered to coact with corresponding chamfered edges of the jaws 24.
  • the jaws 24 When the jack 1 is extended, the jaws 24 are thereby forced towards each other by means of the cooperation between said chamfered edges, so that said jaws are automatically forced out of one pair of grooves and engage the next higher situated pair of grooves under the influence of the compression spring. Should a rupture occur in the supply conduit, the jack head 5 can thus sink only a distance corresponding to the distance between two consecutive pairs of grooves.
  • the jaws 24 are maintained in a position displaced towards each other, for instance by means of a hydraulic cylinder acting between said jaws.
  • the lower edges of the grooves 25 and the corresponding edges of the jaws 24 may also be chamfered in the same way and for the same purpose as the bottom edges 11' of the gap 11 and the corresponding edges of the support plates 18.
  • Said support member 7 may instead be provided with a lifting member, preferably having the same form as the jack head 5 with the projection 6, shown in the drawings, which lifting member by means of a jack arranged outside of the support member is displaced up and down in said support member to lift and lower one or several supporting elements 15 in the manner described above.
  • Said lifting member may also be provided with jaws 24 as shown in FIG. 4 to prevent unintentional lowering of the load, as set for hereinabove.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Fluid-Damping Devices (AREA)
  • Earth Drilling (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
US06/343,806 1979-07-05 1982-01-29 Device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks Expired - Lifetime US4427181A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7905887 1979-07-05
SE7905887A SE417082B (sv) 1979-07-05 1979-07-05 Anordning for att stegvis lyfta laster, speciellt stora laster, med hjelp av en eller flera domkrafter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06163858 Continuation 1980-06-27

Publications (1)

Publication Number Publication Date
US4427181A true US4427181A (en) 1984-01-24

Family

ID=20338458

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/343,806 Expired - Lifetime US4427181A (en) 1979-07-05 1982-01-29 Device for lifting loads, especially heavy loads, in a stepwise manner by means of one or several jacks

Country Status (16)

Country Link
US (1) US4427181A (de)
JP (1) JPS5612297A (de)
AU (1) AU540361B2 (de)
BR (1) BR8004148A (de)
CA (1) CA1143364A (de)
DE (1) DE3025017A1 (de)
ES (1) ES493113A0 (de)
FR (1) FR2460881B1 (de)
GB (1) GB2053150B (de)
IT (1) IT1128901B (de)
MX (1) MX150681A (de)
MY (1) MY8600417A (de)
NL (1) NL184889C (de)
NO (1) NO152687C (de)
SE (1) SE417082B (de)
ZA (1) ZA803929B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8757593B2 (en) 2012-05-10 2014-06-24 Commonwealth Dynamics, Inc. Ratchet pawl system, device and method
CN112830412A (zh) * 2020-12-31 2021-05-25 上海同力建设机器人有限公司 半自动快速换手升降装置

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57195994A (en) * 1981-05-27 1982-12-01 Nippon Tsun Kk Method and device for mounting heavy material
JPS5992897A (ja) * 1982-11-19 1984-05-29 金井　政次郎 昇降装置
JPS63262415A (ja) * 1987-04-17 1988-10-28 Fuji Denshi Kogyo Kk 高周波焼入方法及びその装置
DE3742296A1 (de) * 1987-12-14 1989-06-29 Jun Ernst Hohrenk Hubvorrichtung fuer schwere lasten
DE3824563A1 (de) * 1988-07-19 1990-02-08 Delu Luftkissen Verfahren und einrichtung zum anheben und abstuetzen schwerer grossraeumiger lasten, insbesondere von schienengebundenen wagons auf mehreren vorgegebenen arbeitshoehen
EP0397878A4 (en) * 1988-11-29 1991-04-17 Gosudarstvenny Proektno-Konstruktorsky Institut Tekhnologii Montazha Promyshlennogo Oborudovania - Giprotekhmontazh Load-lifting device
WO1990009334A1 (en) * 1989-02-17 1990-08-23 Gosudarstvenny Proektno-Konstruktorsky Institut Tekhnologii Montazha Promyshlennogo Oborudovania Giprotekhmontazh Weight lifting device
FR2679214B1 (fr) * 1991-07-15 1993-11-19 Marcel Costard Systeme concu pour soulever des fortes charges.
FR2679215B1 (fr) * 1991-07-15 1993-11-19 Marcel Costard Systeme elevateur de charge lourde.
GB2275252B (en) * 1993-02-23 1996-02-28 Marsden Smedley Robert Andrew Jacking apparatus
NL1042448B1 (nl) * 2017-06-30 2019-01-14 Ale R&D vijzelinrichting

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503333A (fr) * 1914-10-21 1920-06-08 Tryggve Olaf Sommerstad Dispositif actionné par un liquide sous pression pour l'élévation de lourdes charges
US1505443A (en) * 1923-04-09 1924-08-19 Hampton A Stone Lifting device
CH377075A (de) * 1959-07-03 1964-04-30 Ernst Dipl Ing Waelli Einrichtung zum stufenweisen Heben von auf der Baustelle hergestellten Bauwerkteilen
NL6405158A (de) * 1964-05-08 1965-11-09
SE363798C (sv) * 1972-05-04 1976-09-27 D V H Johansson Anordning for att stegvis lyfta laster, spec. stora laster
GB1422200A (en) * 1973-04-30 1976-01-21 Johansson D V H Device for lifting loads step-by-step especially heavy loads

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8757593B2 (en) 2012-05-10 2014-06-24 Commonwealth Dynamics, Inc. Ratchet pawl system, device and method
CN112830412A (zh) * 2020-12-31 2021-05-25 上海同力建设机器人有限公司 半自动快速换手升降装置
CN112830412B (zh) * 2020-12-31 2022-04-05 上海同力建设机器人有限公司 半自动快速换手升降装置

Also Published As

Publication number Publication date
CA1143364A (en) 1983-03-22
FR2460881B1 (fr) 1986-01-17
IT8068058A0 (it) 1980-07-04
GB2053150A (en) 1981-02-04
DE3025017A1 (de) 1981-01-08
JPS5612297A (en) 1981-02-06
ZA803929B (en) 1981-06-24
SE7905887L (de) 1981-01-06
NO152687C (no) 1985-11-06
SE417082B (sv) 1981-02-23
NL184889C (nl) 1989-12-01
DE3025017C2 (de) 1989-09-07
NO802002L (no) 1981-01-06
BR8004148A (pt) 1981-01-21
IT1128901B (it) 1986-06-04
NL184889B (nl) 1989-07-03
FR2460881A1 (fr) 1981-01-30
AU540361B2 (en) 1984-11-15
JPS6334119B2 (de) 1988-07-08
NL8003786A (nl) 1981-01-07
NO152687B (no) 1985-07-29
MX150681A (es) 1984-06-27
AU6003480A (en) 1981-01-15
MY8600417A (en) 1986-12-31
ES8102975A1 (es) 1981-02-16
GB2053150B (en) 1983-04-20
ES493113A0 (es) 1981-02-16

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